Back-rest attachment for seats.



A. ANDERSEN.

BACK REST ATTACHMENT FOR SEATS.

APPLICATION FILED FEB- E, i915.

Patented J an. 25, 1916.

Ramon) Gunman" J4, 8.1m WW3 srarne re BACK-REST ATTACHMENT FOR SEATS.

Specification of Letters Patent.

Patented Jan. 25, rare.

Application filed February 6, 1915. Serial No. 6,613.

To all whom it may concern Be it known that I, ARNOLD ANnnnsnN, acitizen of the United States, residing at Harris, in the county ofOsceola and State of Iowa, have invented certainnew and usefulImprovements in Back-Rest Attach ments for 5563135, of which thefollowing is a specification. I

The present invention relates to a back rest attachment for seats, andhas for its object to provide a device of this character which embodiesnovel featuresof construction whereby it can be readily applied to anyof the conventional forms of seatordinarily provided upon agriculturalma chines and the like. i

Further objects of the'invention are to provide a device of thischaracter which is simple and inexpensive in its construction, which canbe easily and quickly applied to the seat or removed therefrom, whichwill provide a comfortable support for theback, and which will not be inthe way or interfere with the free movements of the person upon theseat.

With these and other objects in view, the invention consists in certainnovel combinations and arrangements of the parts as will more fullyappear as the description proceeds, the novel features thereof beingpointed out in the appended claims.

For a full understanding of the invention, reference is to be had to thefollowing de scription and accompanying drawing, in which I Figure 1 isa side elevation of a seat provided with a back rest constructed inaccordance with the invention. Fig. 2 is a top plan view of the same.Fig. 8 is an enlarged sectional view through one of the seat engagingclamp members. Fig. f is a detail perspective view of the frame of theback rest. Fig. 5 is an enlarged detail sectional view showing themanner of adjustably connecting the back rest strip to the back restframe.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

For the purpose of illustration the invention is shown as applied to aseat 1 of the type commonly employed upon agricultural machines and thelike, said seat being mounted upon the usual standard 2. The sides andrear end of the seat are curved up.

an upper clamping finger 3 and a lower clamping block 4. The clampingblocks at each have a toe portion 4k which fits against the exterior ofone of the upturned sides of the seat, and a heel portion 4* whichprojects rearwardly from the seat and is formed with an opening 5loosely receiving one of the side bars 6 of the back rest frame. A

set screw 7 is provided for locking the said side barin an adjustedposition and holding it against moving upwardly or downwardly while theback rest is in use.

The clamping block 4 of each of the clamps A is provided at anintermediate point in its length with a notched seat 8 adapted toreceive and [it against the flange 1 of the seat and also with a notchedseat 9 adapted to receive the upper end of the clampingiinger 3. Thisclamping finger 3 has an angular formation, being bent to provide thetwo arms 3 and 8 which are dis posed at an angle to each other. Thelower arm 3 has an opposed relation to the toe 4 of the block 4: andcooperates therewith to grip the, edge of the seat 1, while the upperarm 3* of the clamping finger is engaged by a clamping bolt 10 passingthrough both the finger and the block, the extremity of the said upperarm 3 of the finger resting upon the seat 9. By tightening the clampingbolt 10 the lower arm 3 of the clamping finger can be drawn toward thetoe portion 4 of the block 4 so that the edge of the seat is securelygripped between the two members and the clamp is held rigidly inposition;

The side bars 6 of the back rest frame have the lower ends thereofextended forwardly to provide lateral arms 6 which engage the bottom ofthe seat 1 so as to provide braces or spring supports for the back restframe. The upper ends of the side bars 6 of the back rest frame areconnected by a back rest strip 11 which is adjustably mounted thereon.means may be provided for mounting this back rest strip 11 upon the sidebars 6,

although in the present instance it is connected thereto by means ofbolts 12 which Any suitable I pass through slots 14 in the side bars 6and can be adjusted up and down therein.

With the construction illustrated and described it will be understoodthat the back rest attachment can be very quickly applied to any of theconventional forms ofseats by fitting the clamps A upon the rear edgethereof and then suitably adjusting the back rest frame in the clamps. Acomfortable rest is thus provided for the back and the device will in nomanner interfere with the free movements of the person upon the seat.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent, is

1. A back rest attachment for seats, including a pair of clamps each ofwhich comprises a clamping block formed with a toe portion adapted toengage the seat and a heel portion projecting rearwardly from the seat,a notched seat being provided between the heel portion and toe portion,a clamping finger having one end thereof in engagement with the notchedseat while the opposite end thereoficooperates with the toe of the blockto grip the edge of the seat, and a clamping bolt engaging the clampingfinger and clamping block, a back rest frame formed with side barsadjustably mounted upon the heel portions of the clamping blocks, and aback rest bar applied to the said frame.

2. A back rest attachment for seats, in cluding corresponding clampingblocks formed with toe portions adapted to fit against the exterior ofthe edge of the seat and heel portions adapted to project rearwardlyfrom the seat, each of the clamping blocks being provided at anintermediate point in its length with a pair of notched seats, one ofwhich receives the flange of the seat, a clamping finger for each of theclamping blocks, said clamping fingers being formed with two angularlydisposed arms one of which is seated in the other notched seat of theclamping block, while the other arm cooperates with the toe portion ofthe clamping block to grip the edge of the seat, clamping boltsconnecting the clamping fingers and clamping blocks, a back rest frameformed with side bars which are adjustably mounted upon the heelportions of the clamping blocks, and a back rest bar mounted upon thesaid frame.

3. A back rest attachment for seats, including corresponding clampingblocks formed with toe portions adapted to engage the exterior of thesides of the seat and heel portions adapted to project rearwardly fromthe seat, each of the clamping blocks being formed at an intermediatepoint in its length with a pair of notched seats one of which receivesthe edge flange of the seat, a clamping finger for each of the clampingblocks, said clamping finger being formed with two angularly disposedarms one of which is seated in the other notched seat of the clamp ingblock while the other arm cooperates with the toe portion of theclamping block to grip the edge of the seat, clamping bolts connectingthe clamping fingers and clamping blocks, a back rest frame formed'withCopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

